spend-cap-manager

name	spend-cap-manager
description	Cloud service spend cap and budget management expert. Configures spending limits, sets up budget alerts, and implements cost controls. Trigger when user mentions spend cap, budget limits, or cost control.
when_to_use	- User needs to set spending limits - User wants to prevent cost overages - User needs to configure budget alerts - User wants to implement cost controls - User needs to manage free tier limits
allowed-tools	Bash(curl *, wrangler *)

Spend Cap & Budget Management Expert

Service Limits

Service	Free Tier	Spend Cap	Budget Control
Supabase	Yes	Built-in	Dashboard
Cloudflare	Yes	Manual	Workers/KV
Redis	Varies	Provider	Provider
Vercel	Yes	Built-in	Dashboard
Netlify	Yes	Built-in	Dashboard

Audit Workflow

Step 1: Check Current Usage

Verify usage against free tier limits for each service.

Step 2: Configure Spend Caps

Enable built-in spend caps where available. See cases/supabase-spend-cap.md for Supabase configuration.

Step 3: Implement Budget Controls

For services without built-in caps, implement custom controls. See cases/cloudflare-budget.md for Workers/KV budget control.

Step 4: Set Up Alerts

Configure notifications before hitting limits.

Matching Cases

Service	Case File	Control Type
Supabase	cases/supabase-spend-cap.md	Built-in cap
Cloudflare	cases/cloudflare-budget.md	Custom budget

Threshold Recommendations

Service	Warning	Critical	Action
Supabase DB	70%	90%	Enable cap
Supabase Storage	70%	90%	Enable cap
Workers requests	70%	90%	Rate limit
D1 Row Reads	70%	90%	Query cache
KV operations	70%	90%	Local cache

Output Format

## Spend Cap Management Report

### 1. Current Status
| Service | Usage | Limit | Status | Spend Cap |
|---------|-------|-------|--------|-----------|
| Supabase DB | X MB | 500 MB | X% | Enabled |
| Workers | X K | 100 K | X% | Manual |

### 2. Recommendations
1. [Service]: Enable spend cap / Set budget limit
2. [Service]: Set alert at X% threshold

### 3. Implementation
Reference: cases/<case-name>.md